+++ /dev/null
-/* misc.c -- miscellaneous bindable readline functions. */
-
-/* Copyright (C) 1987-2017 Free Software Foundation, Inc.
-
- This file is part of the GNU Readline Library (Readline), a library
- for reading lines of text with interactive input and history editing.
-
- Readline is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Readline is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Readline. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#define READLINE_LIBRARY
-
-#if defined (HAVE_CONFIG_H)
-# include <config.h>
-#endif
-
-#if defined (HAVE_UNISTD_H)
-# include <unistd.h>
-#endif /* HAVE_UNISTD_H */
-
-#if defined (HAVE_STDLIB_H)
-# include <stdlib.h>
-#else
-# include "ansi_stdlib.h"
-#endif /* HAVE_STDLIB_H */
-
-#if defined (HAVE_LOCALE_H)
-# include <locale.h>
-#endif
-
-#include <stdio.h>
-
-/* System-specific feature definitions and include files. */
-#include "rldefs.h"
-#include "rlmbutil.h"
-
-/* Some standard library routines. */
-#include "readline.h"
-#include "history.h"
-
-#include "rlprivate.h"
-#include "rlshell.h"
-#include "xmalloc.h"
-
-static int rl_digit_loop PARAMS((void));
-static void _rl_history_set_point PARAMS((void));
-
-/* Forward declarations used in this file */
-void _rl_free_history_entry PARAMS((HIST_ENTRY *));
-
-/* If non-zero, rl_get_previous_history and rl_get_next_history attempt
- to preserve the value of rl_point from line to line. */
-int _rl_history_preserve_point = 0;
-
-_rl_arg_cxt _rl_argcxt;
-
-/* Saved target point for when _rl_history_preserve_point is set. Special
- value of -1 means that point is at the end of the line. */
-int _rl_history_saved_point = -1;
-
-/* **************************************************************** */
-/* */
-/* Numeric Arguments */
-/* */
-/* **************************************************************** */
-
-int
-_rl_arg_overflow (void)
-{
- if (rl_numeric_arg > 1000000)
- {
- _rl_argcxt = 0;
- rl_explicit_arg = rl_numeric_arg = 0;
- rl_ding ();
- rl_restore_prompt ();
- rl_clear_message ();
- RL_UNSETSTATE(RL_STATE_NUMERICARG);
- return 1;
- }
- return 0;
-}
-
-void
-_rl_arg_init (void)
-{
- rl_save_prompt ();
- _rl_argcxt = 0;
- RL_SETSTATE(RL_STATE_NUMERICARG);
-}
-
-int
-_rl_arg_getchar (void)
-{
- int c;
-
- rl_message ("(arg: %d) ", rl_arg_sign * rl_numeric_arg);
- RL_SETSTATE(RL_STATE_MOREINPUT);
- c = rl_read_key ();
- RL_UNSETSTATE(RL_STATE_MOREINPUT);
-
- return c;
-}
-
-/* Process C as part of the current numeric argument. Return -1 if the
- argument should be aborted, 0 if we should not read any more chars, and
- 1 if we should continue to read chars. */
-int
-_rl_arg_dispatch (_rl_arg_cxt cxt, int c)
-{
- int key, r;
-
- key = c;
-
- /* If we see a key bound to `universal-argument' after seeing digits,
- it ends the argument but is otherwise ignored. */
- if (c >= 0 && _rl_keymap[c].type == ISFUNC && _rl_keymap[c].function == rl_universal_argument)
- {
- if ((cxt & NUM_SAWDIGITS) == 0)
- {
- rl_numeric_arg *= 4;
- return 1;
- }
- else if (RL_ISSTATE (RL_STATE_CALLBACK))
- {
- _rl_argcxt |= NUM_READONE;
- return 0; /* XXX */
- }
- else
- {
- RL_SETSTATE(RL_STATE_MOREINPUT);
- key = rl_read_key ();
- RL_UNSETSTATE(RL_STATE_MOREINPUT);
- rl_restore_prompt ();
- rl_clear_message ();
- RL_UNSETSTATE(RL_STATE_NUMERICARG);
- if (key < 0)
- return -1;
- return (_rl_dispatch (key, _rl_keymap));
- }
- }
-
- c = UNMETA (c);
-
- if (_rl_digit_p (c))
- {
- r = _rl_digit_value (c);
- rl_numeric_arg = rl_explicit_arg ? (rl_numeric_arg * 10) + r : r;
- rl_explicit_arg = 1;
- _rl_argcxt |= NUM_SAWDIGITS;
- }
- else if (c == '-' && rl_explicit_arg == 0)
- {
- rl_numeric_arg = 1;
- _rl_argcxt |= NUM_SAWMINUS;
- rl_arg_sign = -1;
- }
- else
- {
- /* Make M-- command equivalent to M--1 command. */
- if ((_rl_argcxt & NUM_SAWMINUS) && rl_numeric_arg == 1 && rl_explicit_arg == 0)
- rl_explicit_arg = 1;
- rl_restore_prompt ();
- rl_clear_message ();
- RL_UNSETSTATE(RL_STATE_NUMERICARG);
-
- r = _rl_dispatch (key, _rl_keymap);
- if (RL_ISSTATE (RL_STATE_CALLBACK))
- {
- /* At worst, this will cause an extra redisplay. Otherwise,
- we have to wait until the next character comes in. */
- if (rl_done == 0)
- (*rl_redisplay_function) ();
- r = 0;
- }
- return r;
- }
-
- return 1;
-}
-
-/* Handle C-u style numeric args, as well as M--, and M-digits. */
-static int
-rl_digit_loop (void)
-{
- int c, r;
-
- while (1)
- {
- if (_rl_arg_overflow ())
- return 1;
-
- c = _rl_arg_getchar ();
-
- if (c < 0)
- {
- _rl_abort_internal ();
- return -1;
- }
-
- r = _rl_arg_dispatch (_rl_argcxt, c);
- if (r <= 0 || (RL_ISSTATE (RL_STATE_NUMERICARG) == 0))
- break;
- }
-
- return r;
-}
-
-/* Create a default argument. */
-void
-_rl_reset_argument (void)
-{
- rl_numeric_arg = rl_arg_sign = 1;
- rl_explicit_arg = 0;
- _rl_argcxt = 0;
-}
-
-/* Start a numeric argument with initial value KEY */
-int
-rl_digit_argument (int ignore, int key)
-{
- _rl_arg_init ();
- if (RL_ISSTATE (RL_STATE_CALLBACK))
- {
- _rl_arg_dispatch (_rl_argcxt, key);
- rl_message ("(arg: %d) ", rl_arg_sign * rl_numeric_arg);
- return 0;
- }
- else
- {
- rl_execute_next (key);
- return (rl_digit_loop ());
- }
-}
-
-/* C-u, universal argument. Multiply the current argument by 4.
- Read a key. If the key has nothing to do with arguments, then
- dispatch on it. If the key is the abort character then abort. */
-int
-rl_universal_argument (int count, int key)
-{
- _rl_arg_init ();
- rl_numeric_arg *= 4;
-
- return (RL_ISSTATE (RL_STATE_CALLBACK) ? 0 : rl_digit_loop ());
-}
-
-int
-_rl_arg_callback (_rl_arg_cxt cxt)
-{
- int c, r;
-
- c = _rl_arg_getchar ();
- if (c < 0)
- return (1); /* EOF */
-
- if (_rl_argcxt & NUM_READONE)
- {
- _rl_argcxt &= ~NUM_READONE;
- rl_restore_prompt ();
- rl_clear_message ();
- RL_UNSETSTATE(RL_STATE_NUMERICARG);
- rl_execute_next (c);
- return 0;
- }
-
- r = _rl_arg_dispatch (cxt, c);
- if (r > 0)
- rl_message ("(arg: %d) ", rl_arg_sign * rl_numeric_arg);
- return (r != 1);
-}
-
-/* What to do when you abort reading an argument. */
-int
-rl_discard_argument (void)
-{
- rl_ding ();
- rl_clear_message ();
- _rl_reset_argument ();
-
- return 0;
-}
-
-/* **************************************************************** */
-/* */
-/* History Utilities */
-/* */
-/* **************************************************************** */
-
-/* We already have a history library, and that is what we use to control
- the history features of readline. This is our local interface to
- the history mechanism. */
-
-/* While we are editing the history, this is the saved
- version of the original line. */
-HIST_ENTRY *_rl_saved_line_for_history = (HIST_ENTRY *)NULL;
-
-/* Set the history pointer back to the last entry in the history. */
-void
-_rl_start_using_history (void)
-{
- using_history ();
- if (_rl_saved_line_for_history)
- _rl_free_history_entry (_rl_saved_line_for_history);
-
- _rl_saved_line_for_history = (HIST_ENTRY *)NULL;
-}
-
-/* Free the contents (and containing structure) of a HIST_ENTRY. */
-void
-_rl_free_history_entry (HIST_ENTRY *entry)
-{
- if (entry == 0)
- return;
-
- FREE (entry->line);
- FREE (entry->timestamp);
-
- xfree (entry);
-}
-
-/* Perhaps put back the current line if it has changed. */
-int
-rl_maybe_replace_line (void)
-{
- HIST_ENTRY *temp;
-
- temp = current_history ();
- /* If the current line has changed, save the changes. */
- if (temp && ((UNDO_LIST *)(temp->data) != rl_undo_list))
- {
- temp = replace_history_entry (where_history (), rl_line_buffer, (histdata_t)rl_undo_list);
- xfree (temp->line);
- FREE (temp->timestamp);
- xfree (temp);
- }
- return 0;
-}
-
-/* Restore the _rl_saved_line_for_history if there is one. */
-int
-rl_maybe_unsave_line (void)
-{
- if (_rl_saved_line_for_history)
- {
- /* Can't call with `1' because rl_undo_list might point to an undo
- list from a history entry, as in rl_replace_from_history() below. */
- rl_replace_line (_rl_saved_line_for_history->line, 0);
- rl_undo_list = (UNDO_LIST *)_rl_saved_line_for_history->data;
- _rl_free_history_entry (_rl_saved_line_for_history);
- _rl_saved_line_for_history = (HIST_ENTRY *)NULL;
- rl_point = rl_end; /* rl_replace_line sets rl_end */
- }
- else
- rl_ding ();
- return 0;
-}
-
-/* Save the current line in _rl_saved_line_for_history. */
-int
-rl_maybe_save_line (void)
-{
- if (_rl_saved_line_for_history == 0)
- {
- _rl_saved_line_for_history = (HIST_ENTRY *)xmalloc (sizeof (HIST_ENTRY));
- _rl_saved_line_for_history->line = savestring (rl_line_buffer);
- _rl_saved_line_for_history->timestamp = (char *)NULL;
- _rl_saved_line_for_history->data = (char *)rl_undo_list;
- }
-
- return 0;
-}
-
-int
-_rl_free_saved_history_line (void)
-{
- if (_rl_saved_line_for_history)
- {
- _rl_free_history_entry (_rl_saved_line_for_history);
- _rl_saved_line_for_history = (HIST_ENTRY *)NULL;
- }
- return 0;
-}
-
-static void
-_rl_history_set_point (void)
-{
- rl_point = (_rl_history_preserve_point && _rl_history_saved_point != -1)
- ? _rl_history_saved_point
- : rl_end;
- if (rl_point > rl_end)
- rl_point = rl_end;
-
-#if defined (VI_MODE)
- if (rl_editing_mode == vi_mode && _rl_keymap != vi_insertion_keymap)
- rl_point = 0;
-#endif /* VI_MODE */
-
- if (rl_editing_mode == emacs_mode)
- rl_mark = (rl_point == rl_end ? 0 : rl_end);
-}
-
-void
-rl_replace_from_history (HIST_ENTRY *entry, int flags)
-{
- /* Can't call with `1' because rl_undo_list might point to an undo list
- from a history entry, just like we're setting up here. */
- rl_replace_line (entry->line, 0);
- rl_undo_list = (UNDO_LIST *)entry->data;
- rl_point = rl_end;
- rl_mark = 0;
-
-#if defined (VI_MODE)
- if (rl_editing_mode == vi_mode)
- {
- rl_point = 0;
- rl_mark = rl_end;
- }
-#endif
-}
-
-/* Process and free undo lists attached to each history entry prior to the
- current entry, inclusive, reverting each line to its saved state. This
- is destructive, and state about the current line is lost. This is not
- intended to be called while actively editing, and the current line is
- not assumed to have been added to the history list. */
-void
-_rl_revert_all_lines (void)
-{
- int hpos;
- HIST_ENTRY *entry;
- UNDO_LIST *ul, *saved_undo_list;
- char *lbuf;
-
- lbuf = savestring (rl_line_buffer);
- saved_undo_list = rl_undo_list;
- hpos = where_history ();
-
- entry = (hpos == history_length) ? previous_history () : current_history ();
- while (entry)
- {
- if (ul = (UNDO_LIST *)entry->data)
- {
- if (ul == saved_undo_list)
- saved_undo_list = 0;
- /* Set up rl_line_buffer and other variables from history entry */
- rl_replace_from_history (entry, 0); /* entry->line is now current */
- entry->data = 0; /* entry->data is now current undo list */
- /* Undo all changes to this history entry */
- while (rl_undo_list)
- rl_do_undo ();
- /* And copy the reverted line back to the history entry, preserving
- the timestamp. */
- FREE (entry->line);
- entry->line = savestring (rl_line_buffer);
- }
- entry = previous_history ();
- }
-
- /* Restore history state */
- rl_undo_list = saved_undo_list; /* may have been set to null */
- history_set_pos (hpos);
-
- /* reset the line buffer */
- rl_replace_line (lbuf, 0);
- _rl_set_the_line ();
-
- /* and clean up */
- xfree (lbuf);
-}
-
-/* Free the history list, including private readline data and take care
- of pointer aliases to history data. Resets rl_undo_list if it points
- to an UNDO_LIST * saved as some history entry's data member. This
- should not be called while editing is active. */
-void
-rl_clear_history (void)
-{
- HIST_ENTRY **hlist, *hent;
- register int i;
- UNDO_LIST *ul, *saved_undo_list;
-
- saved_undo_list = rl_undo_list;
- hlist = history_list (); /* direct pointer, not copy */
-
- for (i = 0; i < history_length; i++)
- {
- hent = hlist[i];
- if (ul = (UNDO_LIST *)hent->data)
- {
- if (ul == saved_undo_list)
- saved_undo_list = 0;
- _rl_free_undo_list (ul);
- hent->data = 0;
- }
- _rl_free_history_entry (hent);
- }
-
- history_offset = history_length = 0;
- rl_undo_list = saved_undo_list; /* should be NULL */
-}
-
-/* **************************************************************** */
-/* */
-/* History Commands */
-/* */
-/* **************************************************************** */
-
-/* Meta-< goes to the start of the history. */
-int
-rl_beginning_of_history (int count, int key)
-{
- return (rl_get_previous_history (1 + where_history (), key));
-}
-
-/* Meta-> goes to the end of the history. (The current line). */
-int
-rl_end_of_history (int count, int key)
-{
- rl_maybe_replace_line ();
- using_history ();
- rl_maybe_unsave_line ();
- return 0;
-}
-
-/* Move down to the next history line. */
-int
-rl_get_next_history (int count, int key)
-{
- HIST_ENTRY *temp;
-
- if (count < 0)
- return (rl_get_previous_history (-count, key));
-
- if (count == 0)
- return 0;
-
- rl_maybe_replace_line ();
-
- /* either not saved by rl_newline or at end of line, so set appropriately. */
- if (_rl_history_saved_point == -1 && (rl_point || rl_end))
- _rl_history_saved_point = (rl_point == rl_end) ? -1 : rl_point;
-
- temp = (HIST_ENTRY *)NULL;
- while (count)
- {
- temp = next_history ();
- if (!temp)
- break;
- --count;
- }
-
- if (temp == 0)
- rl_maybe_unsave_line ();
- else
- {
- rl_replace_from_history (temp, 0);
- _rl_history_set_point ();
- }
- return 0;
-}
-
-/* Get the previous item out of our interactive history, making it the current
- line. If there is no previous history, just ding. */
-int
-rl_get_previous_history (int count, int key)
-{
- HIST_ENTRY *old_temp, *temp;
-
- if (count < 0)
- return (rl_get_next_history (-count, key));
-
- if (count == 0 || history_list () == 0)
- return 0;
-
- /* either not saved by rl_newline or at end of line, so set appropriately. */
- if (_rl_history_saved_point == -1 && (rl_point || rl_end))
- _rl_history_saved_point = (rl_point == rl_end) ? -1 : rl_point;
-
- /* If we don't have a line saved, then save this one. */
- rl_maybe_save_line ();
-
- /* If the current line has changed, save the changes. */
- rl_maybe_replace_line ();
-
- temp = old_temp = (HIST_ENTRY *)NULL;
- while (count)
- {
- temp = previous_history ();
- if (temp == 0)
- break;
-
- old_temp = temp;
- --count;
- }
-
- /* If there was a large argument, and we moved back to the start of the
- history, that is not an error. So use the last value found. */
- if (!temp && old_temp)
- temp = old_temp;
-
- if (temp == 0)
- {
- rl_maybe_unsave_line ();
- rl_ding ();
- }
- else
- {
- rl_replace_from_history (temp, 0);
- _rl_history_set_point ();
- }
-
- return 0;
-}
-
-/* **************************************************************** */
-/* */
-/* Editing Modes */
-/* */
-/* **************************************************************** */
-/* How to toggle back and forth between editing modes. */
-int
-rl_vi_editing_mode (int count, int key)
-{
-#if defined (VI_MODE)
- _rl_set_insert_mode (RL_IM_INSERT, 1); /* vi mode ignores insert mode */
- rl_editing_mode = vi_mode;
- rl_vi_insert_mode (1, key);
-#endif /* VI_MODE */
-
- return 0;
-}
-
-int
-rl_emacs_editing_mode (int count, int key)
-{
- rl_editing_mode = emacs_mode;
- _rl_set_insert_mode (RL_IM_INSERT, 1); /* emacs mode default is insert mode */
- _rl_keymap = emacs_standard_keymap;
-
- if (_rl_show_mode_in_prompt)
- _rl_reset_prompt ();
-
- return 0;
-}
-
-/* Function for the rest of the library to use to set insert/overwrite mode. */
-void
-_rl_set_insert_mode (int im, int force)
-{
-#ifdef CURSOR_MODE
- _rl_set_cursor (im, force);
-#endif
-
- rl_insert_mode = im;
-}
-
-/* Toggle overwrite mode. A positive explicit argument selects overwrite
- mode. A negative or zero explicit argument selects insert mode. */
-int
-rl_overwrite_mode (int count, int key)
-{
- if (rl_explicit_arg == 0)
- _rl_set_insert_mode (rl_insert_mode ^ 1, 0);
- else if (count > 0)
- _rl_set_insert_mode (RL_IM_OVERWRITE, 0);
- else
- _rl_set_insert_mode (RL_IM_INSERT, 0);
-
- return 0;
-}
projects / deliverable / binutils-gdb.git / blobdiff